However, the etching step needs to come after you clean the concrete. TSP and TSP substitute work equally well for this purpose, according to a technical-help person at the Savogran Co. (800-225 ...

You can also use electrolytic methods for a deeper etch, but we think acid etching is a little more ... Then use UV photo resist spray like “positiv 20” or the dry film photoresist they ...

A new type of permanent graffiti or “tagging” — acid etching — is costing city business owners thousands of dollars because it cannot be removed and is done on expensive window glass that ...